Mary Callahan Erdoes

Mary Callahan Erdoes arrives for a meeting seven minutes late, apologizing profusely. The CEO of JPMorganChase's mammoth asset and wealth management (AWM) business moved into the company's gleaming new headquarters at 270 Park Avenue a day earlier and underestimated the return time to her office after escorting a client to the entrance. "This building is the craziest thing that's happened to New York City in a long time," she said.

If you really want to see something crazy, look at the high-energy Erdoes' workload—and her results. Over the past year she's shepherded the bank's high-net-worth clients through a volatile spring, flown around the world to meet with heads of state and billionaires, spoken at big forums, including the World Economic Forum in Davos, Switzerland, and even helped fetch a record price for a venerable sports franchise. She also played a high-profile role as the most senior member of Chairman and CEO Jamie Dimon's operating committee.